1949. Electronic Delay Storage Automatic Calculator (EDSAC) was an early British computer. The machine, was constructed by Maurice Wilkes and his team at the University of Cambridge Mathematical Laboratory in England. EDSAC ran its first programs on 6 May 1949, when it calculated a table of squares and a list of prime numbers. A rebuild project is just under way by the Computer Conservation Society. The EDSAC will be rebuilt over 3-4 years at the National Museum of Computing, Bletchley.